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Note on the determination of the orientation of section planes of meteoritic irons

Published online by Cambridge University Press:  14 March 2018

P. Terpstra
P. Terpstra*
Affiliation:
University of Groningen
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Extract

Recently Dr. M. H. Hey published in this journal a method to construct graphically a projection showing the relation of two etched surfaces M and N to the crystallographic axes of a mass of the Gibeon meteoritic shower. Upon those faces could be distinguished the traces of four octahedron planes 0l, 02, 03, 04 which are inclined at the following angles, measured clockwise from the intersection [MN] of the etched surfaces: on surface M 22°, 62°, 98°, and 135° and for the same octahedron planes on surface N 106°, 38°, 150°, and 86°, respectively.

The two faces M and N are at an angle of 84° one to the other. Hey's solution of the problem is based on a reversal of the Goldschmidt construction for drawing crystals from the gnomonic projection.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 27 , Issue 194 , September 1946 , pp. 263 - 265
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1946

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References

page 263 note 1 Hey, M. H., Min. Mag., 1942, vol. 26, pp. 141–166.CrossRefGoogle Scholar

page 263 note 2 Terpstra, P., Kristallometrie. Groningen, 1946, p. 17.Google Scholar